Petitioner was arrested for driving while intoxicated and refused the chemical test.  As a result petitioner’s license was revoked by an administrative law judge.  The Second Department annulled the determination of the Department of Motor Vehicles Appeals Board (which upheld the revocation).  The court determined the arresting officer did not have “reasonable suspicion” justifying the initial stop.  Petitioner was in a parked car with the engine running. The officer parked behind petitioner’s car, blocking any exit, and then approached the car. Only then did the officer notice signs of intoxication:

At a hearing held pursuant to Vehicle and Traffic Law § 1194, the hearing officer is required to determine, inter alia, whether the police lawfully arrested the operator of the motor vehicle for operating such vehicle while under the influence of alcohol or drugs in violation of Vehicle and Traffic Law § 1192 … . In order for an arrest to be lawful, the initial stop must itself be lawful (see People v De Bour, 40 NY2d 210, 222). Under the circumstances of this case, where the officer prevented the petitioner from departing, activated his vehicle’s emergency lights, and shined a light into the petitioner’s parked vehicle, a forcible stop and detention occurred … . The Department of Motor Vehicles, however, failed to establish that there was reasonable suspicion to justify the forcible stop and detention of the petitioner’s person or vehicle … and, accordingly, the challenged determination cannot be sustained. Matter of Stewart v Fiala, 2015 NY Slip Op 04857, 2nd Dept 6-10-15